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Merge tag 'libnvdimm-fix-5.3-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git...
[mirror_ubuntu-eoan-kernel.git] / include / net / xfrm.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _NET_XFRM_H
3 #define _NET_XFRM_H
4
5 #include <linux/compiler.h>
6 #include <linux/xfrm.h>
7 #include <linux/spinlock.h>
8 #include <linux/list.h>
9 #include <linux/skbuff.h>
10 #include <linux/socket.h>
11 #include <linux/pfkeyv2.h>
12 #include <linux/ipsec.h>
13 #include <linux/in6.h>
14 #include <linux/mutex.h>
15 #include <linux/audit.h>
16 #include <linux/slab.h>
17 #include <linux/refcount.h>
18
19 #include <net/sock.h>
20 #include <net/dst.h>
21 #include <net/ip.h>
22 #include <net/route.h>
23 #include <net/ipv6.h>
24 #include <net/ip6_fib.h>
25 #include <net/flow.h>
26 #include <net/gro_cells.h>
27
28 #include <linux/interrupt.h>
29
30 #ifdef CONFIG_XFRM_STATISTICS
31 #include <net/snmp.h>
32 #endif
33
34 #define XFRM_PROTO_ESP 50
35 #define XFRM_PROTO_AH 51
36 #define XFRM_PROTO_COMP 108
37 #define XFRM_PROTO_IPIP 4
38 #define XFRM_PROTO_IPV6 41
39 #define XFRM_PROTO_ROUTING IPPROTO_ROUTING
40 #define XFRM_PROTO_DSTOPTS IPPROTO_DSTOPTS
41
42 #define XFRM_ALIGN4(len) (((len) + 3) & ~3)
43 #define XFRM_ALIGN8(len) (((len) + 7) & ~7)
44 #define MODULE_ALIAS_XFRM_MODE(family, encap) \
45 MODULE_ALIAS("xfrm-mode-" __stringify(family) "-" __stringify(encap))
46 #define MODULE_ALIAS_XFRM_TYPE(family, proto) \
47 MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
48 #define MODULE_ALIAS_XFRM_OFFLOAD_TYPE(family, proto) \
49 MODULE_ALIAS("xfrm-offload-" __stringify(family) "-" __stringify(proto))
50
51 #ifdef CONFIG_XFRM_STATISTICS
52 #define XFRM_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.xfrm_statistics, field)
53 #else
54 #define XFRM_INC_STATS(net, field) ((void)(net))
55 #endif
56
57
58 /* Organization of SPD aka "XFRM rules"
59 ------------------------------------
60
61 Basic objects:
62 - policy rule, struct xfrm_policy (=SPD entry)
63 - bundle of transformations, struct dst_entry == struct xfrm_dst (=SA bundle)
64 - instance of a transformer, struct xfrm_state (=SA)
65 - template to clone xfrm_state, struct xfrm_tmpl
66
67 SPD is plain linear list of xfrm_policy rules, ordered by priority.
68 (To be compatible with existing pfkeyv2 implementations,
69 many rules with priority of 0x7fffffff are allowed to exist and
70 such rules are ordered in an unpredictable way, thanks to bsd folks.)
71
72 Lookup is plain linear search until the first match with selector.
73
74 If "action" is "block", then we prohibit the flow, otherwise:
75 if "xfrms_nr" is zero, the flow passes untransformed. Otherwise,
76 policy entry has list of up to XFRM_MAX_DEPTH transformations,
77 described by templates xfrm_tmpl. Each template is resolved
78 to a complete xfrm_state (see below) and we pack bundle of transformations
79 to a dst_entry returned to requestor.
80
81 dst -. xfrm .-> xfrm_state #1
82 |---. child .-> dst -. xfrm .-> xfrm_state #2
83 |---. child .-> dst -. xfrm .-> xfrm_state #3
84 |---. child .-> NULL
85
86 Bundles are cached at xrfm_policy struct (field ->bundles).
87
88
89 Resolution of xrfm_tmpl
90 -----------------------
91 Template contains:
92 1. ->mode Mode: transport or tunnel
93 2. ->id.proto Protocol: AH/ESP/IPCOMP
94 3. ->id.daddr Remote tunnel endpoint, ignored for transport mode.
95 Q: allow to resolve security gateway?
96 4. ->id.spi If not zero, static SPI.
97 5. ->saddr Local tunnel endpoint, ignored for transport mode.
98 6. ->algos List of allowed algos. Plain bitmask now.
99 Q: ealgos, aalgos, calgos. What a mess...
100 7. ->share Sharing mode.
101 Q: how to implement private sharing mode? To add struct sock* to
102 flow id?
103
104 Having this template we search through SAD searching for entries
105 with appropriate mode/proto/algo, permitted by selector.
106 If no appropriate entry found, it is requested from key manager.
107
108 PROBLEMS:
109 Q: How to find all the bundles referring to a physical path for
110 PMTU discovery? Seems, dst should contain list of all parents...
111 and enter to infinite locking hierarchy disaster.
112 No! It is easier, we will not search for them, let them find us.
113 We add genid to each dst plus pointer to genid of raw IP route,
114 pmtu disc will update pmtu on raw IP route and increase its genid.
115 dst_check() will see this for top level and trigger resyncing
116 metrics. Plus, it will be made via sk->sk_dst_cache. Solved.
117 */
118
119 struct xfrm_state_walk {
120 struct list_head all;
121 u8 state;
122 u8 dying;
123 u8 proto;
124 u32 seq;
125 struct xfrm_address_filter *filter;
126 };
127
128 struct xfrm_state_offload {
129 struct net_device *dev;
130 unsigned long offload_handle;
131 unsigned int num_exthdrs;
132 u8 flags;
133 };
134
135 struct xfrm_mode {
136 u8 encap;
137 u8 family;
138 u8 flags;
139 };
140
141 /* Flags for xfrm_mode. */
142 enum {
143 XFRM_MODE_FLAG_TUNNEL = 1,
144 };
145
146 /* Full description of state of transformer. */
147 struct xfrm_state {
148 possible_net_t xs_net;
149 union {
150 struct hlist_node gclist;
151 struct hlist_node bydst;
152 };
153 struct hlist_node bysrc;
154 struct hlist_node byspi;
155
156 refcount_t refcnt;
157 spinlock_t lock;
158
159 struct xfrm_id id;
160 struct xfrm_selector sel;
161 struct xfrm_mark mark;
162 u32 if_id;
163 u32 tfcpad;
164
165 u32 genid;
166
167 /* Key manager bits */
168 struct xfrm_state_walk km;
169
170 /* Parameters of this state. */
171 struct {
172 u32 reqid;
173 u8 mode;
174 u8 replay_window;
175 u8 aalgo, ealgo, calgo;
176 u8 flags;
177 u16 family;
178 xfrm_address_t saddr;
179 int header_len;
180 int trailer_len;
181 u32 extra_flags;
182 struct xfrm_mark smark;
183 } props;
184
185 struct xfrm_lifetime_cfg lft;
186
187 /* Data for transformer */
188 struct xfrm_algo_auth *aalg;
189 struct xfrm_algo *ealg;
190 struct xfrm_algo *calg;
191 struct xfrm_algo_aead *aead;
192 const char *geniv;
193
194 /* Data for encapsulator */
195 struct xfrm_encap_tmpl *encap;
196
197 /* Data for care-of address */
198 xfrm_address_t *coaddr;
199
200 /* IPComp needs an IPIP tunnel for handling uncompressed packets */
201 struct xfrm_state *tunnel;
202
203 /* If a tunnel, number of users + 1 */
204 atomic_t tunnel_users;
205
206 /* State for replay detection */
207 struct xfrm_replay_state replay;
208 struct xfrm_replay_state_esn *replay_esn;
209
210 /* Replay detection state at the time we sent the last notification */
211 struct xfrm_replay_state preplay;
212 struct xfrm_replay_state_esn *preplay_esn;
213
214 /* The functions for replay detection. */
215 const struct xfrm_replay *repl;
216
217 /* internal flag that only holds state for delayed aevent at the
218 * moment
219 */
220 u32 xflags;
221
222 /* Replay detection notification settings */
223 u32 replay_maxage;
224 u32 replay_maxdiff;
225
226 /* Replay detection notification timer */
227 struct timer_list rtimer;
228
229 /* Statistics */
230 struct xfrm_stats stats;
231
232 struct xfrm_lifetime_cur curlft;
233 struct hrtimer mtimer;
234
235 struct xfrm_state_offload xso;
236
237 /* used to fix curlft->add_time when changing date */
238 long saved_tmo;
239
240 /* Last used time */
241 time64_t lastused;
242
243 struct page_frag xfrag;
244
245 /* Reference to data common to all the instances of this
246 * transformer. */
247 const struct xfrm_type *type;
248 struct xfrm_mode inner_mode;
249 struct xfrm_mode inner_mode_iaf;
250 struct xfrm_mode outer_mode;
251
252 const struct xfrm_type_offload *type_offload;
253
254 /* Security context */
255 struct xfrm_sec_ctx *security;
256
257 /* Private data of this transformer, format is opaque,
258 * interpreted by xfrm_type methods. */
259 void *data;
260 };
261
262 static inline struct net *xs_net(struct xfrm_state *x)
263 {
264 return read_pnet(&x->xs_net);
265 }
266
267 /* xflags - make enum if more show up */
268 #define XFRM_TIME_DEFER 1
269 #define XFRM_SOFT_EXPIRE 2
270
271 enum {
272 XFRM_STATE_VOID,
273 XFRM_STATE_ACQ,
274 XFRM_STATE_VALID,
275 XFRM_STATE_ERROR,
276 XFRM_STATE_EXPIRED,
277 XFRM_STATE_DEAD
278 };
279
280 /* callback structure passed from either netlink or pfkey */
281 struct km_event {
282 union {
283 u32 hard;
284 u32 proto;
285 u32 byid;
286 u32 aevent;
287 u32 type;
288 } data;
289
290 u32 seq;
291 u32 portid;
292 u32 event;
293 struct net *net;
294 };
295
296 struct xfrm_replay {
297 void (*advance)(struct xfrm_state *x, __be32 net_seq);
298 int (*check)(struct xfrm_state *x,
299 struct sk_buff *skb,
300 __be32 net_seq);
301 int (*recheck)(struct xfrm_state *x,
302 struct sk_buff *skb,
303 __be32 net_seq);
304 void (*notify)(struct xfrm_state *x, int event);
305 int (*overflow)(struct xfrm_state *x, struct sk_buff *skb);
306 };
307
308 struct xfrm_if_cb {
309 struct xfrm_if *(*decode_session)(struct sk_buff *skb,
310 unsigned short family);
311 };
312
313 void xfrm_if_register_cb(const struct xfrm_if_cb *ifcb);
314 void xfrm_if_unregister_cb(void);
315
316 struct net_device;
317 struct xfrm_type;
318 struct xfrm_dst;
319 struct xfrm_policy_afinfo {
320 struct dst_ops *dst_ops;
321 struct dst_entry *(*dst_lookup)(struct net *net,
322 int tos, int oif,
323 const xfrm_address_t *saddr,
324 const xfrm_address_t *daddr,
325 u32 mark);
326 int (*get_saddr)(struct net *net, int oif,
327 xfrm_address_t *saddr,
328 xfrm_address_t *daddr,
329 u32 mark);
330 int (*fill_dst)(struct xfrm_dst *xdst,
331 struct net_device *dev,
332 const struct flowi *fl);
333 struct dst_entry *(*blackhole_route)(struct net *net, struct dst_entry *orig);
334 };
335
336 int xfrm_policy_register_afinfo(const struct xfrm_policy_afinfo *afinfo, int family);
337 void xfrm_policy_unregister_afinfo(const struct xfrm_policy_afinfo *afinfo);
338 void km_policy_notify(struct xfrm_policy *xp, int dir,
339 const struct km_event *c);
340 void km_state_notify(struct xfrm_state *x, const struct km_event *c);
341
342 struct xfrm_tmpl;
343 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t,
344 struct xfrm_policy *pol);
345 void km_state_expired(struct xfrm_state *x, int hard, u32 portid);
346 int __xfrm_state_delete(struct xfrm_state *x);
347
348 struct xfrm_state_afinfo {
349 u8 family;
350 u8 proto;
351
352 const struct xfrm_type_offload *type_offload_esp;
353
354 const struct xfrm_type *type_esp;
355 const struct xfrm_type *type_ipip;
356 const struct xfrm_type *type_ipip6;
357 const struct xfrm_type *type_comp;
358 const struct xfrm_type *type_ah;
359 const struct xfrm_type *type_routing;
360 const struct xfrm_type *type_dstopts;
361
362 int (*output)(struct net *net, struct sock *sk, struct sk_buff *skb);
363 int (*output_finish)(struct sock *sk, struct sk_buff *skb);
364 int (*extract_input)(struct xfrm_state *x,
365 struct sk_buff *skb);
366 int (*extract_output)(struct xfrm_state *x,
367 struct sk_buff *skb);
368 int (*transport_finish)(struct sk_buff *skb,
369 int async);
370 void (*local_error)(struct sk_buff *skb, u32 mtu);
371 };
372
373 int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
374 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo);
375 struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
376 struct xfrm_state_afinfo *xfrm_state_afinfo_get_rcu(unsigned int family);
377
378 struct xfrm_input_afinfo {
379 unsigned int family;
380 int (*callback)(struct sk_buff *skb, u8 protocol,
381 int err);
382 };
383
384 int xfrm_input_register_afinfo(const struct xfrm_input_afinfo *afinfo);
385 int xfrm_input_unregister_afinfo(const struct xfrm_input_afinfo *afinfo);
386
387 void xfrm_flush_gc(void);
388 void xfrm_state_delete_tunnel(struct xfrm_state *x);
389
390 struct xfrm_type {
391 char *description;
392 struct module *owner;
393 u8 proto;
394 u8 flags;
395 #define XFRM_TYPE_NON_FRAGMENT 1
396 #define XFRM_TYPE_REPLAY_PROT 2
397 #define XFRM_TYPE_LOCAL_COADDR 4
398 #define XFRM_TYPE_REMOTE_COADDR 8
399
400 int (*init_state)(struct xfrm_state *x);
401 void (*destructor)(struct xfrm_state *);
402 int (*input)(struct xfrm_state *, struct sk_buff *skb);
403 int (*output)(struct xfrm_state *, struct sk_buff *pskb);
404 int (*reject)(struct xfrm_state *, struct sk_buff *,
405 const struct flowi *);
406 int (*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
407 };
408
409 int xfrm_register_type(const struct xfrm_type *type, unsigned short family);
410 void xfrm_unregister_type(const struct xfrm_type *type, unsigned short family);
411
412 struct xfrm_type_offload {
413 char *description;
414 struct module *owner;
415 u8 proto;
416 void (*encap)(struct xfrm_state *, struct sk_buff *pskb);
417 int (*input_tail)(struct xfrm_state *x, struct sk_buff *skb);
418 int (*xmit)(struct xfrm_state *, struct sk_buff *pskb, netdev_features_t features);
419 };
420
421 int xfrm_register_type_offload(const struct xfrm_type_offload *type, unsigned short family);
422 void xfrm_unregister_type_offload(const struct xfrm_type_offload *type, unsigned short family);
423
424 static inline int xfrm_af2proto(unsigned int family)
425 {
426 switch(family) {
427 case AF_INET:
428 return IPPROTO_IPIP;
429 case AF_INET6:
430 return IPPROTO_IPV6;
431 default:
432 return 0;
433 }
434 }
435
436 static inline const struct xfrm_mode *xfrm_ip2inner_mode(struct xfrm_state *x, int ipproto)
437 {
438 if ((ipproto == IPPROTO_IPIP && x->props.family == AF_INET) ||
439 (ipproto == IPPROTO_IPV6 && x->props.family == AF_INET6))
440 return &x->inner_mode;
441 else
442 return &x->inner_mode_iaf;
443 }
444
445 struct xfrm_tmpl {
446 /* id in template is interpreted as:
447 * daddr - destination of tunnel, may be zero for transport mode.
448 * spi - zero to acquire spi. Not zero if spi is static, then
449 * daddr must be fixed too.
450 * proto - AH/ESP/IPCOMP
451 */
452 struct xfrm_id id;
453
454 /* Source address of tunnel. Ignored, if it is not a tunnel. */
455 xfrm_address_t saddr;
456
457 unsigned short encap_family;
458
459 u32 reqid;
460
461 /* Mode: transport, tunnel etc. */
462 u8 mode;
463
464 /* Sharing mode: unique, this session only, this user only etc. */
465 u8 share;
466
467 /* May skip this transfomration if no SA is found */
468 u8 optional;
469
470 /* Skip aalgos/ealgos/calgos checks. */
471 u8 allalgs;
472
473 /* Bit mask of algos allowed for acquisition */
474 u32 aalgos;
475 u32 ealgos;
476 u32 calgos;
477 };
478
479 #define XFRM_MAX_DEPTH 6
480 #define XFRM_MAX_OFFLOAD_DEPTH 1
481
482 struct xfrm_policy_walk_entry {
483 struct list_head all;
484 u8 dead;
485 };
486
487 struct xfrm_policy_walk {
488 struct xfrm_policy_walk_entry walk;
489 u8 type;
490 u32 seq;
491 };
492
493 struct xfrm_policy_queue {
494 struct sk_buff_head hold_queue;
495 struct timer_list hold_timer;
496 unsigned long timeout;
497 };
498
499 struct xfrm_policy {
500 possible_net_t xp_net;
501 struct hlist_node bydst;
502 struct hlist_node byidx;
503
504 /* This lock only affects elements except for entry. */
505 rwlock_t lock;
506 refcount_t refcnt;
507 u32 pos;
508 struct timer_list timer;
509
510 atomic_t genid;
511 u32 priority;
512 u32 index;
513 u32 if_id;
514 struct xfrm_mark mark;
515 struct xfrm_selector selector;
516 struct xfrm_lifetime_cfg lft;
517 struct xfrm_lifetime_cur curlft;
518 struct xfrm_policy_walk_entry walk;
519 struct xfrm_policy_queue polq;
520 bool bydst_reinsert;
521 u8 type;
522 u8 action;
523 u8 flags;
524 u8 xfrm_nr;
525 u16 family;
526 struct xfrm_sec_ctx *security;
527 struct xfrm_tmpl xfrm_vec[XFRM_MAX_DEPTH];
528 struct hlist_node bydst_inexact_list;
529 struct rcu_head rcu;
530 };
531
532 static inline struct net *xp_net(const struct xfrm_policy *xp)
533 {
534 return read_pnet(&xp->xp_net);
535 }
536
537 struct xfrm_kmaddress {
538 xfrm_address_t local;
539 xfrm_address_t remote;
540 u32 reserved;
541 u16 family;
542 };
543
544 struct xfrm_migrate {
545 xfrm_address_t old_daddr;
546 xfrm_address_t old_saddr;
547 xfrm_address_t new_daddr;
548 xfrm_address_t new_saddr;
549 u8 proto;
550 u8 mode;
551 u16 reserved;
552 u32 reqid;
553 u16 old_family;
554 u16 new_family;
555 };
556
557 #define XFRM_KM_TIMEOUT 30
558 /* what happened */
559 #define XFRM_REPLAY_UPDATE XFRM_AE_CR
560 #define XFRM_REPLAY_TIMEOUT XFRM_AE_CE
561
562 /* default aevent timeout in units of 100ms */
563 #define XFRM_AE_ETIME 10
564 /* Async Event timer multiplier */
565 #define XFRM_AE_ETH_M 10
566 /* default seq threshold size */
567 #define XFRM_AE_SEQT_SIZE 2
568
569 struct xfrm_mgr {
570 struct list_head list;
571 int (*notify)(struct xfrm_state *x, const struct km_event *c);
572 int (*acquire)(struct xfrm_state *x, struct xfrm_tmpl *, struct xfrm_policy *xp);
573 struct xfrm_policy *(*compile_policy)(struct sock *sk, int opt, u8 *data, int len, int *dir);
574 int (*new_mapping)(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
575 int (*notify_policy)(struct xfrm_policy *x, int dir, const struct km_event *c);
576 int (*report)(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr);
577 int (*migrate)(const struct xfrm_selector *sel,
578 u8 dir, u8 type,
579 const struct xfrm_migrate *m,
580 int num_bundles,
581 const struct xfrm_kmaddress *k,
582 const struct xfrm_encap_tmpl *encap);
583 bool (*is_alive)(const struct km_event *c);
584 };
585
586 int xfrm_register_km(struct xfrm_mgr *km);
587 int xfrm_unregister_km(struct xfrm_mgr *km);
588
589 struct xfrm_tunnel_skb_cb {
590 union {
591 struct inet_skb_parm h4;
592 struct inet6_skb_parm h6;
593 } header;
594
595 union {
596 struct ip_tunnel *ip4;
597 struct ip6_tnl *ip6;
598 } tunnel;
599 };
600
601 #define XFRM_TUNNEL_SKB_CB(__skb) ((struct xfrm_tunnel_skb_cb *)&((__skb)->cb[0]))
602
603 /*
604 * This structure is used for the duration where packets are being
605 * transformed by IPsec. As soon as the packet leaves IPsec the
606 * area beyond the generic IP part may be overwritten.
607 */
608 struct xfrm_skb_cb {
609 struct xfrm_tunnel_skb_cb header;
610
611 /* Sequence number for replay protection. */
612 union {
613 struct {
614 __u32 low;
615 __u32 hi;
616 } output;
617 struct {
618 __be32 low;
619 __be32 hi;
620 } input;
621 } seq;
622 };
623
624 #define XFRM_SKB_CB(__skb) ((struct xfrm_skb_cb *)&((__skb)->cb[0]))
625
626 /*
627 * This structure is used by the afinfo prepare_input/prepare_output functions
628 * to transmit header information to the mode input/output functions.
629 */
630 struct xfrm_mode_skb_cb {
631 struct xfrm_tunnel_skb_cb header;
632
633 /* Copied from header for IPv4, always set to zero and DF for IPv6. */
634 __be16 id;
635 __be16 frag_off;
636
637 /* IP header length (excluding options or extension headers). */
638 u8 ihl;
639
640 /* TOS for IPv4, class for IPv6. */
641 u8 tos;
642
643 /* TTL for IPv4, hop limitfor IPv6. */
644 u8 ttl;
645
646 /* Protocol for IPv4, NH for IPv6. */
647 u8 protocol;
648
649 /* Option length for IPv4, zero for IPv6. */
650 u8 optlen;
651
652 /* Used by IPv6 only, zero for IPv4. */
653 u8 flow_lbl[3];
654 };
655
656 #define XFRM_MODE_SKB_CB(__skb) ((struct xfrm_mode_skb_cb *)&((__skb)->cb[0]))
657
658 /*
659 * This structure is used by the input processing to locate the SPI and
660 * related information.
661 */
662 struct xfrm_spi_skb_cb {
663 struct xfrm_tunnel_skb_cb header;
664
665 unsigned int daddroff;
666 unsigned int family;
667 __be32 seq;
668 };
669
670 #define XFRM_SPI_SKB_CB(__skb) ((struct xfrm_spi_skb_cb *)&((__skb)->cb[0]))
671
672 #ifdef CONFIG_AUDITSYSCALL
673 static inline struct audit_buffer *xfrm_audit_start(const char *op)
674 {
675 struct audit_buffer *audit_buf = NULL;
676
677 if (audit_enabled == AUDIT_OFF)
678 return NULL;
679 audit_buf = audit_log_start(audit_context(), GFP_ATOMIC,
680 AUDIT_MAC_IPSEC_EVENT);
681 if (audit_buf == NULL)
682 return NULL;
683 audit_log_format(audit_buf, "op=%s", op);
684 return audit_buf;
685 }
686
687 static inline void xfrm_audit_helper_usrinfo(bool task_valid,
688 struct audit_buffer *audit_buf)
689 {
690 const unsigned int auid = from_kuid(&init_user_ns, task_valid ?
691 audit_get_loginuid(current) :
692 INVALID_UID);
693 const unsigned int ses = task_valid ? audit_get_sessionid(current) :
694 AUDIT_SID_UNSET;
695
696 audit_log_format(audit_buf, " auid=%u ses=%u", auid, ses);
697 audit_log_task_context(audit_buf);
698 }
699
700 void xfrm_audit_policy_add(struct xfrm_policy *xp, int result, bool task_valid);
701 void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
702 bool task_valid);
703 void xfrm_audit_state_add(struct xfrm_state *x, int result, bool task_valid);
704 void xfrm_audit_state_delete(struct xfrm_state *x, int result, bool task_valid);
705 void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
706 struct sk_buff *skb);
707 void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb,
708 __be32 net_seq);
709 void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family);
710 void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi,
711 __be32 net_seq);
712 void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb,
713 u8 proto);
714 #else
715
716 static inline void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
717 bool task_valid)
718 {
719 }
720
721 static inline void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
722 bool task_valid)
723 {
724 }
725
726 static inline void xfrm_audit_state_add(struct xfrm_state *x, int result,
727 bool task_valid)
728 {
729 }
730
731 static inline void xfrm_audit_state_delete(struct xfrm_state *x, int result,
732 bool task_valid)
733 {
734 }
735
736 static inline void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
737 struct sk_buff *skb)
738 {
739 }
740
741 static inline void xfrm_audit_state_replay(struct xfrm_state *x,
742 struct sk_buff *skb, __be32 net_seq)
743 {
744 }
745
746 static inline void xfrm_audit_state_notfound_simple(struct sk_buff *skb,
747 u16 family)
748 {
749 }
750
751 static inline void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
752 __be32 net_spi, __be32 net_seq)
753 {
754 }
755
756 static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
757 struct sk_buff *skb, u8 proto)
758 {
759 }
760 #endif /* CONFIG_AUDITSYSCALL */
761
762 static inline void xfrm_pol_hold(struct xfrm_policy *policy)
763 {
764 if (likely(policy != NULL))
765 refcount_inc(&policy->refcnt);
766 }
767
768 void xfrm_policy_destroy(struct xfrm_policy *policy);
769
770 static inline void xfrm_pol_put(struct xfrm_policy *policy)
771 {
772 if (refcount_dec_and_test(&policy->refcnt))
773 xfrm_policy_destroy(policy);
774 }
775
776 static inline void xfrm_pols_put(struct xfrm_policy **pols, int npols)
777 {
778 int i;
779 for (i = npols - 1; i >= 0; --i)
780 xfrm_pol_put(pols[i]);
781 }
782
783 void __xfrm_state_destroy(struct xfrm_state *, bool);
784
785 static inline void __xfrm_state_put(struct xfrm_state *x)
786 {
787 refcount_dec(&x->refcnt);
788 }
789
790 static inline void xfrm_state_put(struct xfrm_state *x)
791 {
792 if (refcount_dec_and_test(&x->refcnt))
793 __xfrm_state_destroy(x, false);
794 }
795
796 static inline void xfrm_state_put_sync(struct xfrm_state *x)
797 {
798 if (refcount_dec_and_test(&x->refcnt))
799 __xfrm_state_destroy(x, true);
800 }
801
802 static inline void xfrm_state_hold(struct xfrm_state *x)
803 {
804 refcount_inc(&x->refcnt);
805 }
806
807 static inline bool addr_match(const void *token1, const void *token2,
808 unsigned int prefixlen)
809 {
810 const __be32 *a1 = token1;
811 const __be32 *a2 = token2;
812 unsigned int pdw;
813 unsigned int pbi;
814
815 pdw = prefixlen >> 5; /* num of whole u32 in prefix */
816 pbi = prefixlen & 0x1f; /* num of bits in incomplete u32 in prefix */
817
818 if (pdw)
819 if (memcmp(a1, a2, pdw << 2))
820 return false;
821
822 if (pbi) {
823 __be32 mask;
824
825 mask = htonl((0xffffffff) << (32 - pbi));
826
827 if ((a1[pdw] ^ a2[pdw]) & mask)
828 return false;
829 }
830
831 return true;
832 }
833
834 static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
835 {
836 /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
837 if (sizeof(long) == 4 && prefixlen == 0)
838 return true;
839 return !((a1 ^ a2) & htonl(~0UL << (32 - prefixlen)));
840 }
841
842 static __inline__
843 __be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
844 {
845 __be16 port;
846 switch(fl->flowi_proto) {
847 case IPPROTO_TCP:
848 case IPPROTO_UDP:
849 case IPPROTO_UDPLITE:
850 case IPPROTO_SCTP:
851 port = uli->ports.sport;
852 break;
853 case IPPROTO_ICMP:
854 case IPPROTO_ICMPV6:
855 port = htons(uli->icmpt.type);
856 break;
857 case IPPROTO_MH:
858 port = htons(uli->mht.type);
859 break;
860 case IPPROTO_GRE:
861 port = htons(ntohl(uli->gre_key) >> 16);
862 break;
863 default:
864 port = 0; /*XXX*/
865 }
866 return port;
867 }
868
869 static __inline__
870 __be16 xfrm_flowi_dport(const struct flowi *fl, const union flowi_uli *uli)
871 {
872 __be16 port;
873 switch(fl->flowi_proto) {
874 case IPPROTO_TCP:
875 case IPPROTO_UDP:
876 case IPPROTO_UDPLITE:
877 case IPPROTO_SCTP:
878 port = uli->ports.dport;
879 break;
880 case IPPROTO_ICMP:
881 case IPPROTO_ICMPV6:
882 port = htons(uli->icmpt.code);
883 break;
884 case IPPROTO_GRE:
885 port = htons(ntohl(uli->gre_key) & 0xffff);
886 break;
887 default:
888 port = 0; /*XXX*/
889 }
890 return port;
891 }
892
893 bool xfrm_selector_match(const struct xfrm_selector *sel,
894 const struct flowi *fl, unsigned short family);
895
896 #ifdef CONFIG_SECURITY_NETWORK_XFRM
897 /* If neither has a context --> match
898 * Otherwise, both must have a context and the sids, doi, alg must match
899 */
900 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
901 {
902 return ((!s1 && !s2) ||
903 (s1 && s2 &&
904 (s1->ctx_sid == s2->ctx_sid) &&
905 (s1->ctx_doi == s2->ctx_doi) &&
906 (s1->ctx_alg == s2->ctx_alg)));
907 }
908 #else
909 static inline bool xfrm_sec_ctx_match(struct xfrm_sec_ctx *s1, struct xfrm_sec_ctx *s2)
910 {
911 return true;
912 }
913 #endif
914
915 /* A struct encoding bundle of transformations to apply to some set of flow.
916 *
917 * xdst->child points to the next element of bundle.
918 * dst->xfrm points to an instanse of transformer.
919 *
920 * Due to unfortunate limitations of current routing cache, which we
921 * have no time to fix, it mirrors struct rtable and bound to the same
922 * routing key, including saddr,daddr. However, we can have many of
923 * bundles differing by session id. All the bundles grow from a parent
924 * policy rule.
925 */
926 struct xfrm_dst {
927 union {
928 struct dst_entry dst;
929 struct rtable rt;
930 struct rt6_info rt6;
931 } u;
932 struct dst_entry *route;
933 struct dst_entry *child;
934 struct dst_entry *path;
935 struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
936 int num_pols, num_xfrms;
937 u32 xfrm_genid;
938 u32 policy_genid;
939 u32 route_mtu_cached;
940 u32 child_mtu_cached;
941 u32 route_cookie;
942 u32 path_cookie;
943 };
944
945 static inline struct dst_entry *xfrm_dst_path(const struct dst_entry *dst)
946 {
947 #ifdef CONFIG_XFRM
948 if (dst->xfrm) {
949 const struct xfrm_dst *xdst = (const struct xfrm_dst *) dst;
950
951 return xdst->path;
952 }
953 #endif
954 return (struct dst_entry *) dst;
955 }
956
957 static inline struct dst_entry *xfrm_dst_child(const struct dst_entry *dst)
958 {
959 #ifdef CONFIG_XFRM
960 if (dst->xfrm) {
961 struct xfrm_dst *xdst = (struct xfrm_dst *) dst;
962 return xdst->child;
963 }
964 #endif
965 return NULL;
966 }
967
968 #ifdef CONFIG_XFRM
969 static inline void xfrm_dst_set_child(struct xfrm_dst *xdst, struct dst_entry *child)
970 {
971 xdst->child = child;
972 }
973
974 static inline void xfrm_dst_destroy(struct xfrm_dst *xdst)
975 {
976 xfrm_pols_put(xdst->pols, xdst->num_pols);
977 dst_release(xdst->route);
978 if (likely(xdst->u.dst.xfrm))
979 xfrm_state_put(xdst->u.dst.xfrm);
980 }
981 #endif
982
983 void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev);
984
985 struct xfrm_if_parms {
986 char name[IFNAMSIZ]; /* name of XFRM device */
987 int link; /* ifindex of underlying L2 interface */
988 u32 if_id; /* interface identifyer */
989 };
990
991 struct xfrm_if {
992 struct xfrm_if __rcu *next; /* next interface in list */
993 struct net_device *dev; /* virtual device associated with interface */
994 struct net_device *phydev; /* physical device */
995 struct net *net; /* netns for packet i/o */
996 struct xfrm_if_parms p; /* interface parms */
997
998 struct gro_cells gro_cells;
999 };
1000
1001 struct xfrm_offload {
1002 /* Output sequence number for replay protection on offloading. */
1003 struct {
1004 __u32 low;
1005 __u32 hi;
1006 } seq;
1007
1008 __u32 flags;
1009 #define SA_DELETE_REQ 1
1010 #define CRYPTO_DONE 2
1011 #define CRYPTO_NEXT_DONE 4
1012 #define CRYPTO_FALLBACK 8
1013 #define XFRM_GSO_SEGMENT 16
1014 #define XFRM_GRO 32
1015 #define XFRM_ESP_NO_TRAILER 64
1016 #define XFRM_DEV_RESUME 128
1017
1018 __u32 status;
1019 #define CRYPTO_SUCCESS 1
1020 #define CRYPTO_GENERIC_ERROR 2
1021 #define CRYPTO_TRANSPORT_AH_AUTH_FAILED 4
1022 #define CRYPTO_TRANSPORT_ESP_AUTH_FAILED 8
1023 #define CRYPTO_TUNNEL_AH_AUTH_FAILED 16
1024 #define CRYPTO_TUNNEL_ESP_AUTH_FAILED 32
1025 #define CRYPTO_INVALID_PACKET_SYNTAX 64
1026 #define CRYPTO_INVALID_PROTOCOL 128
1027
1028 __u8 proto;
1029 };
1030
1031 struct sec_path {
1032 int len;
1033 int olen;
1034
1035 struct xfrm_state *xvec[XFRM_MAX_DEPTH];
1036 struct xfrm_offload ovec[XFRM_MAX_OFFLOAD_DEPTH];
1037 };
1038
1039 struct sec_path *secpath_set(struct sk_buff *skb);
1040
1041 static inline void
1042 secpath_reset(struct sk_buff *skb)
1043 {
1044 #ifdef CONFIG_XFRM
1045 skb_ext_del(skb, SKB_EXT_SEC_PATH);
1046 #endif
1047 }
1048
1049 static inline int
1050 xfrm_addr_any(const xfrm_address_t *addr, unsigned short family)
1051 {
1052 switch (family) {
1053 case AF_INET:
1054 return addr->a4 == 0;
1055 case AF_INET6:
1056 return ipv6_addr_any(&addr->in6);
1057 }
1058 return 0;
1059 }
1060
1061 static inline int
1062 __xfrm4_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1063 {
1064 return (tmpl->saddr.a4 &&
1065 tmpl->saddr.a4 != x->props.saddr.a4);
1066 }
1067
1068 static inline int
1069 __xfrm6_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x)
1070 {
1071 return (!ipv6_addr_any((struct in6_addr*)&tmpl->saddr) &&
1072 !ipv6_addr_equal((struct in6_addr *)&tmpl->saddr, (struct in6_addr*)&x->props.saddr));
1073 }
1074
1075 static inline int
1076 xfrm_state_addr_cmp(const struct xfrm_tmpl *tmpl, const struct xfrm_state *x, unsigned short family)
1077 {
1078 switch (family) {
1079 case AF_INET:
1080 return __xfrm4_state_addr_cmp(tmpl, x);
1081 case AF_INET6:
1082 return __xfrm6_state_addr_cmp(tmpl, x);
1083 }
1084 return !0;
1085 }
1086
1087 #ifdef CONFIG_XFRM
1088 int __xfrm_policy_check(struct sock *, int dir, struct sk_buff *skb,
1089 unsigned short family);
1090
1091 static inline int __xfrm_policy_check2(struct sock *sk, int dir,
1092 struct sk_buff *skb,
1093 unsigned int family, int reverse)
1094 {
1095 struct net *net = dev_net(skb->dev);
1096 int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
1097
1098 if (sk && sk->sk_policy[XFRM_POLICY_IN])
1099 return __xfrm_policy_check(sk, ndir, skb, family);
1100
1101 return (!net->xfrm.policy_count[dir] && !secpath_exists(skb)) ||
1102 (skb_dst(skb)->flags & DST_NOPOLICY) ||
1103 __xfrm_policy_check(sk, ndir, skb, family);
1104 }
1105
1106 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1107 {
1108 return __xfrm_policy_check2(sk, dir, skb, family, 0);
1109 }
1110
1111 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1112 {
1113 return xfrm_policy_check(sk, dir, skb, AF_INET);
1114 }
1115
1116 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1117 {
1118 return xfrm_policy_check(sk, dir, skb, AF_INET6);
1119 }
1120
1121 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1122 struct sk_buff *skb)
1123 {
1124 return __xfrm_policy_check2(sk, dir, skb, AF_INET, 1);
1125 }
1126
1127 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1128 struct sk_buff *skb)
1129 {
1130 return __xfrm_policy_check2(sk, dir, skb, AF_INET6, 1);
1131 }
1132
1133 int __xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1134 unsigned int family, int reverse);
1135
1136 static inline int xfrm_decode_session(struct sk_buff *skb, struct flowi *fl,
1137 unsigned int family)
1138 {
1139 return __xfrm_decode_session(skb, fl, family, 0);
1140 }
1141
1142 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1143 struct flowi *fl,
1144 unsigned int family)
1145 {
1146 return __xfrm_decode_session(skb, fl, family, 1);
1147 }
1148
1149 int __xfrm_route_forward(struct sk_buff *skb, unsigned short family);
1150
1151 static inline int xfrm_route_forward(struct sk_buff *skb, unsigned short family)
1152 {
1153 struct net *net = dev_net(skb->dev);
1154
1155 return !net->xfrm.policy_count[XFRM_POLICY_OUT] ||
1156 (skb_dst(skb)->flags & DST_NOXFRM) ||
1157 __xfrm_route_forward(skb, family);
1158 }
1159
1160 static inline int xfrm4_route_forward(struct sk_buff *skb)
1161 {
1162 return xfrm_route_forward(skb, AF_INET);
1163 }
1164
1165 static inline int xfrm6_route_forward(struct sk_buff *skb)
1166 {
1167 return xfrm_route_forward(skb, AF_INET6);
1168 }
1169
1170 int __xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk);
1171
1172 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk)
1173 {
1174 sk->sk_policy[0] = NULL;
1175 sk->sk_policy[1] = NULL;
1176 if (unlikely(osk->sk_policy[0] || osk->sk_policy[1]))
1177 return __xfrm_sk_clone_policy(sk, osk);
1178 return 0;
1179 }
1180
1181 int xfrm_policy_delete(struct xfrm_policy *pol, int dir);
1182
1183 static inline void xfrm_sk_free_policy(struct sock *sk)
1184 {
1185 struct xfrm_policy *pol;
1186
1187 pol = rcu_dereference_protected(sk->sk_policy[0], 1);
1188 if (unlikely(pol != NULL)) {
1189 xfrm_policy_delete(pol, XFRM_POLICY_MAX);
1190 sk->sk_policy[0] = NULL;
1191 }
1192 pol = rcu_dereference_protected(sk->sk_policy[1], 1);
1193 if (unlikely(pol != NULL)) {
1194 xfrm_policy_delete(pol, XFRM_POLICY_MAX+1);
1195 sk->sk_policy[1] = NULL;
1196 }
1197 }
1198
1199 #else
1200
1201 static inline void xfrm_sk_free_policy(struct sock *sk) {}
1202 static inline int xfrm_sk_clone_policy(struct sock *sk, const struct sock *osk) { return 0; }
1203 static inline int xfrm6_route_forward(struct sk_buff *skb) { return 1; }
1204 static inline int xfrm4_route_forward(struct sk_buff *skb) { return 1; }
1205 static inline int xfrm6_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1206 {
1207 return 1;
1208 }
1209 static inline int xfrm4_policy_check(struct sock *sk, int dir, struct sk_buff *skb)
1210 {
1211 return 1;
1212 }
1213 static inline int xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb, unsigned short family)
1214 {
1215 return 1;
1216 }
1217 static inline int xfrm_decode_session_reverse(struct sk_buff *skb,
1218 struct flowi *fl,
1219 unsigned int family)
1220 {
1221 return -ENOSYS;
1222 }
1223 static inline int xfrm4_policy_check_reverse(struct sock *sk, int dir,
1224 struct sk_buff *skb)
1225 {
1226 return 1;
1227 }
1228 static inline int xfrm6_policy_check_reverse(struct sock *sk, int dir,
1229 struct sk_buff *skb)
1230 {
1231 return 1;
1232 }
1233 #endif
1234
1235 static __inline__
1236 xfrm_address_t *xfrm_flowi_daddr(const struct flowi *fl, unsigned short family)
1237 {
1238 switch (family){
1239 case AF_INET:
1240 return (xfrm_address_t *)&fl->u.ip4.daddr;
1241 case AF_INET6:
1242 return (xfrm_address_t *)&fl->u.ip6.daddr;
1243 }
1244 return NULL;
1245 }
1246
1247 static __inline__
1248 xfrm_address_t *xfrm_flowi_saddr(const struct flowi *fl, unsigned short family)
1249 {
1250 switch (family){
1251 case AF_INET:
1252 return (xfrm_address_t *)&fl->u.ip4.saddr;
1253 case AF_INET6:
1254 return (xfrm_address_t *)&fl->u.ip6.saddr;
1255 }
1256 return NULL;
1257 }
1258
1259 static __inline__
1260 void xfrm_flowi_addr_get(const struct flowi *fl,
1261 xfrm_address_t *saddr, xfrm_address_t *daddr,
1262 unsigned short family)
1263 {
1264 switch(family) {
1265 case AF_INET:
1266 memcpy(&saddr->a4, &fl->u.ip4.saddr, sizeof(saddr->a4));
1267 memcpy(&daddr->a4, &fl->u.ip4.daddr, sizeof(daddr->a4));
1268 break;
1269 case AF_INET6:
1270 saddr->in6 = fl->u.ip6.saddr;
1271 daddr->in6 = fl->u.ip6.daddr;
1272 break;
1273 }
1274 }
1275
1276 static __inline__ int
1277 __xfrm4_state_addr_check(const struct xfrm_state *x,
1278 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1279 {
1280 if (daddr->a4 == x->id.daddr.a4 &&
1281 (saddr->a4 == x->props.saddr.a4 || !saddr->a4 || !x->props.saddr.a4))
1282 return 1;
1283 return 0;
1284 }
1285
1286 static __inline__ int
1287 __xfrm6_state_addr_check(const struct xfrm_state *x,
1288 const xfrm_address_t *daddr, const xfrm_address_t *saddr)
1289 {
1290 if (ipv6_addr_equal((struct in6_addr *)daddr, (struct in6_addr *)&x->id.daddr) &&
1291 (ipv6_addr_equal((struct in6_addr *)saddr, (struct in6_addr *)&x->props.saddr) ||
1292 ipv6_addr_any((struct in6_addr *)saddr) ||
1293 ipv6_addr_any((struct in6_addr *)&x->props.saddr)))
1294 return 1;
1295 return 0;
1296 }
1297
1298 static __inline__ int
1299 xfrm_state_addr_check(const struct xfrm_state *x,
1300 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
1301 unsigned short family)
1302 {
1303 switch (family) {
1304 case AF_INET:
1305 return __xfrm4_state_addr_check(x, daddr, saddr);
1306 case AF_INET6:
1307 return __xfrm6_state_addr_check(x, daddr, saddr);
1308 }
1309 return 0;
1310 }
1311
1312 static __inline__ int
1313 xfrm_state_addr_flow_check(const struct xfrm_state *x, const struct flowi *fl,
1314 unsigned short family)
1315 {
1316 switch (family) {
1317 case AF_INET:
1318 return __xfrm4_state_addr_check(x,
1319 (const xfrm_address_t *)&fl->u.ip4.daddr,
1320 (const xfrm_address_t *)&fl->u.ip4.saddr);
1321 case AF_INET6:
1322 return __xfrm6_state_addr_check(x,
1323 (const xfrm_address_t *)&fl->u.ip6.daddr,
1324 (const xfrm_address_t *)&fl->u.ip6.saddr);
1325 }
1326 return 0;
1327 }
1328
1329 static inline int xfrm_state_kern(const struct xfrm_state *x)
1330 {
1331 return atomic_read(&x->tunnel_users);
1332 }
1333
1334 static inline bool xfrm_id_proto_valid(u8 proto)
1335 {
1336 switch (proto) {
1337 case IPPROTO_AH:
1338 case IPPROTO_ESP:
1339 case IPPROTO_COMP:
1340 #if IS_ENABLED(CONFIG_IPV6)
1341 case IPPROTO_ROUTING:
1342 case IPPROTO_DSTOPTS:
1343 #endif
1344 return true;
1345 default:
1346 return false;
1347 }
1348 }
1349
1350 /* IPSEC_PROTO_ANY only matches 3 IPsec protocols, 0 could match all. */
1351 static inline int xfrm_id_proto_match(u8 proto, u8 userproto)
1352 {
1353 return (!userproto || proto == userproto ||
1354 (userproto == IPSEC_PROTO_ANY && (proto == IPPROTO_AH ||
1355 proto == IPPROTO_ESP ||
1356 proto == IPPROTO_COMP)));
1357 }
1358
1359 /*
1360 * xfrm algorithm information
1361 */
1362 struct xfrm_algo_aead_info {
1363 char *geniv;
1364 u16 icv_truncbits;
1365 };
1366
1367 struct xfrm_algo_auth_info {
1368 u16 icv_truncbits;
1369 u16 icv_fullbits;
1370 };
1371
1372 struct xfrm_algo_encr_info {
1373 char *geniv;
1374 u16 blockbits;
1375 u16 defkeybits;
1376 };
1377
1378 struct xfrm_algo_comp_info {
1379 u16 threshold;
1380 };
1381
1382 struct xfrm_algo_desc {
1383 char *name;
1384 char *compat;
1385 u8 available:1;
1386 u8 pfkey_supported:1;
1387 union {
1388 struct xfrm_algo_aead_info aead;
1389 struct xfrm_algo_auth_info auth;
1390 struct xfrm_algo_encr_info encr;
1391 struct xfrm_algo_comp_info comp;
1392 } uinfo;
1393 struct sadb_alg desc;
1394 };
1395
1396 /* XFRM protocol handlers. */
1397 struct xfrm4_protocol {
1398 int (*handler)(struct sk_buff *skb);
1399 int (*input_handler)(struct sk_buff *skb, int nexthdr, __be32 spi,
1400 int encap_type);
1401 int (*cb_handler)(struct sk_buff *skb, int err);
1402 int (*err_handler)(struct sk_buff *skb, u32 info);
1403
1404 struct xfrm4_protocol __rcu *next;
1405 int priority;
1406 };
1407
1408 struct xfrm6_protocol {
1409 int (*handler)(struct sk_buff *skb);
1410 int (*cb_handler)(struct sk_buff *skb, int err);
1411 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1412 u8 type, u8 code, int offset, __be32 info);
1413
1414 struct xfrm6_protocol __rcu *next;
1415 int priority;
1416 };
1417
1418 /* XFRM tunnel handlers. */
1419 struct xfrm_tunnel {
1420 int (*handler)(struct sk_buff *skb);
1421 int (*err_handler)(struct sk_buff *skb, u32 info);
1422
1423 struct xfrm_tunnel __rcu *next;
1424 int priority;
1425 };
1426
1427 struct xfrm6_tunnel {
1428 int (*handler)(struct sk_buff *skb);
1429 int (*err_handler)(struct sk_buff *skb, struct inet6_skb_parm *opt,
1430 u8 type, u8 code, int offset, __be32 info);
1431 struct xfrm6_tunnel __rcu *next;
1432 int priority;
1433 };
1434
1435 void xfrm_init(void);
1436 void xfrm4_init(void);
1437 int xfrm_state_init(struct net *net);
1438 void xfrm_state_fini(struct net *net);
1439 void xfrm4_state_init(void);
1440 void xfrm4_protocol_init(void);
1441 #ifdef CONFIG_XFRM
1442 int xfrm6_init(void);
1443 void xfrm6_fini(void);
1444 int xfrm6_state_init(void);
1445 void xfrm6_state_fini(void);
1446 int xfrm6_protocol_init(void);
1447 void xfrm6_protocol_fini(void);
1448 #else
1449 static inline int xfrm6_init(void)
1450 {
1451 return 0;
1452 }
1453 static inline void xfrm6_fini(void)
1454 {
1455 ;
1456 }
1457 #endif
1458
1459 #ifdef CONFIG_XFRM_STATISTICS
1460 int xfrm_proc_init(struct net *net);
1461 void xfrm_proc_fini(struct net *net);
1462 #endif
1463
1464 int xfrm_sysctl_init(struct net *net);
1465 #ifdef CONFIG_SYSCTL
1466 void xfrm_sysctl_fini(struct net *net);
1467 #else
1468 static inline void xfrm_sysctl_fini(struct net *net)
1469 {
1470 }
1471 #endif
1472
1473 void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto,
1474 struct xfrm_address_filter *filter);
1475 int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
1476 int (*func)(struct xfrm_state *, int, void*), void *);
1477 void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net);
1478 struct xfrm_state *xfrm_state_alloc(struct net *net);
1479 void xfrm_state_free(struct xfrm_state *x);
1480 struct xfrm_state *xfrm_state_find(const xfrm_address_t *daddr,
1481 const xfrm_address_t *saddr,
1482 const struct flowi *fl,
1483 struct xfrm_tmpl *tmpl,
1484 struct xfrm_policy *pol, int *err,
1485 unsigned short family, u32 if_id);
1486 struct xfrm_state *xfrm_stateonly_find(struct net *net, u32 mark, u32 if_id,
1487 xfrm_address_t *daddr,
1488 xfrm_address_t *saddr,
1489 unsigned short family,
1490 u8 mode, u8 proto, u32 reqid);
1491 struct xfrm_state *xfrm_state_lookup_byspi(struct net *net, __be32 spi,
1492 unsigned short family);
1493 int xfrm_state_check_expire(struct xfrm_state *x);
1494 void xfrm_state_insert(struct xfrm_state *x);
1495 int xfrm_state_add(struct xfrm_state *x);
1496 int xfrm_state_update(struct xfrm_state *x);
1497 struct xfrm_state *xfrm_state_lookup(struct net *net, u32 mark,
1498 const xfrm_address_t *daddr, __be32 spi,
1499 u8 proto, unsigned short family);
1500 struct xfrm_state *xfrm_state_lookup_byaddr(struct net *net, u32 mark,
1501 const xfrm_address_t *daddr,
1502 const xfrm_address_t *saddr,
1503 u8 proto,
1504 unsigned short family);
1505 #ifdef CONFIG_XFRM_SUB_POLICY
1506 void xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
1507 unsigned short family);
1508 void xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
1509 unsigned short family);
1510 #else
1511 static inline void xfrm_tmpl_sort(struct xfrm_tmpl **d, struct xfrm_tmpl **s,
1512 int n, unsigned short family)
1513 {
1514 }
1515
1516 static inline void xfrm_state_sort(struct xfrm_state **d, struct xfrm_state **s,
1517 int n, unsigned short family)
1518 {
1519 }
1520 #endif
1521
1522 struct xfrmk_sadinfo {
1523 u32 sadhcnt; /* current hash bkts */
1524 u32 sadhmcnt; /* max allowed hash bkts */
1525 u32 sadcnt; /* current running count */
1526 };
1527
1528 struct xfrmk_spdinfo {
1529 u32 incnt;
1530 u32 outcnt;
1531 u32 fwdcnt;
1532 u32 inscnt;
1533 u32 outscnt;
1534 u32 fwdscnt;
1535 u32 spdhcnt;
1536 u32 spdhmcnt;
1537 };
1538
1539 struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);
1540 int xfrm_state_delete(struct xfrm_state *x);
1541 int xfrm_state_flush(struct net *net, u8 proto, bool task_valid, bool sync);
1542 int xfrm_dev_state_flush(struct net *net, struct net_device *dev, bool task_valid);
1543 void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si);
1544 void xfrm_spd_getinfo(struct net *net, struct xfrmk_spdinfo *si);
1545 u32 xfrm_replay_seqhi(struct xfrm_state *x, __be32 net_seq);
1546 int xfrm_init_replay(struct xfrm_state *x);
1547 u32 xfrm_state_mtu(struct xfrm_state *x, int mtu);
1548 int __xfrm_init_state(struct xfrm_state *x, bool init_replay, bool offload);
1549 int xfrm_init_state(struct xfrm_state *x);
1550 int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type);
1551 int xfrm_input_resume(struct sk_buff *skb, int nexthdr);
1552 int xfrm_trans_queue(struct sk_buff *skb,
1553 int (*finish)(struct net *, struct sock *,
1554 struct sk_buff *));
1555 int xfrm_output_resume(struct sk_buff *skb, int err);
1556 int xfrm_output(struct sock *sk, struct sk_buff *skb);
1557
1558 #if IS_ENABLED(CONFIG_NET_PKTGEN)
1559 int pktgen_xfrm_outer_mode_output(struct xfrm_state *x, struct sk_buff *skb);
1560 #endif
1561
1562 void xfrm_local_error(struct sk_buff *skb, int mtu);
1563 int xfrm4_extract_header(struct sk_buff *skb);
1564 int xfrm4_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1565 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
1566 int encap_type);
1567 int xfrm4_transport_finish(struct sk_buff *skb, int async);
1568 int xfrm4_rcv(struct sk_buff *skb);
1569 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1570
1571 static inline int xfrm4_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi)
1572 {
1573 XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
1574 XFRM_SPI_SKB_CB(skb)->family = AF_INET;
1575 XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
1576 return xfrm_input(skb, nexthdr, spi, 0);
1577 }
1578
1579 int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1580 int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1581 int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb);
1582 int xfrm4_protocol_register(struct xfrm4_protocol *handler, unsigned char protocol);
1583 int xfrm4_protocol_deregister(struct xfrm4_protocol *handler, unsigned char protocol);
1584 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family);
1585 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family);
1586 void xfrm4_local_error(struct sk_buff *skb, u32 mtu);
1587 int xfrm6_extract_header(struct sk_buff *skb);
1588 int xfrm6_extract_input(struct xfrm_state *x, struct sk_buff *skb);
1589 int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
1590 struct ip6_tnl *t);
1591 int xfrm6_transport_finish(struct sk_buff *skb, int async);
1592 int xfrm6_rcv_tnl(struct sk_buff *skb, struct ip6_tnl *t);
1593 int xfrm6_rcv(struct sk_buff *skb);
1594 int xfrm6_input_addr(struct sk_buff *skb, xfrm_address_t *daddr,
1595 xfrm_address_t *saddr, u8 proto);
1596 void xfrm6_local_error(struct sk_buff *skb, u32 mtu);
1597 int xfrm6_protocol_register(struct xfrm6_protocol *handler, unsigned char protocol);
1598 int xfrm6_protocol_deregister(struct xfrm6_protocol *handler, unsigned char protocol);
1599 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family);
1600 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family);
1601 __be32 xfrm6_tunnel_alloc_spi(struct net *net, xfrm_address_t *saddr);
1602 __be32 xfrm6_tunnel_spi_lookup(struct net *net, const xfrm_address_t *saddr);
1603 int xfrm6_extract_output(struct xfrm_state *x, struct sk_buff *skb);
1604 int xfrm6_output(struct net *net, struct sock *sk, struct sk_buff *skb);
1605 int xfrm6_output_finish(struct sock *sk, struct sk_buff *skb);
1606 int xfrm6_find_1stfragopt(struct xfrm_state *x, struct sk_buff *skb,
1607 u8 **prevhdr);
1608
1609 #ifdef CONFIG_XFRM
1610 int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb);
1611 int xfrm_user_policy(struct sock *sk, int optname,
1612 u8 __user *optval, int optlen);
1613 #else
1614 static inline int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
1615 {
1616 return -ENOPROTOOPT;
1617 }
1618
1619 static inline int xfrm4_udp_encap_rcv(struct sock *sk, struct sk_buff *skb)
1620 {
1621 /* should not happen */
1622 kfree_skb(skb);
1623 return 0;
1624 }
1625 #endif
1626
1627 struct dst_entry *__xfrm_dst_lookup(struct net *net, int tos, int oif,
1628 const xfrm_address_t *saddr,
1629 const xfrm_address_t *daddr,
1630 int family, u32 mark);
1631
1632 struct xfrm_policy *xfrm_policy_alloc(struct net *net, gfp_t gfp);
1633
1634 void xfrm_policy_walk_init(struct xfrm_policy_walk *walk, u8 type);
1635 int xfrm_policy_walk(struct net *net, struct xfrm_policy_walk *walk,
1636 int (*func)(struct xfrm_policy *, int, int, void*),
1637 void *);
1638 void xfrm_policy_walk_done(struct xfrm_policy_walk *walk, struct net *net);
1639 int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl);
1640 struct xfrm_policy *xfrm_policy_bysel_ctx(struct net *net, u32 mark, u32 if_id,
1641 u8 type, int dir,
1642 struct xfrm_selector *sel,
1643 struct xfrm_sec_ctx *ctx, int delete,
1644 int *err);
1645 struct xfrm_policy *xfrm_policy_byid(struct net *net, u32 mark, u32 if_id, u8,
1646 int dir, u32 id, int delete, int *err);
1647 int xfrm_policy_flush(struct net *net, u8 type, bool task_valid);
1648 void xfrm_policy_hash_rebuild(struct net *net);
1649 u32 xfrm_get_acqseq(void);
1650 int verify_spi_info(u8 proto, u32 min, u32 max);
1651 int xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi);
1652 struct xfrm_state *xfrm_find_acq(struct net *net, const struct xfrm_mark *mark,
1653 u8 mode, u32 reqid, u32 if_id, u8 proto,
1654 const xfrm_address_t *daddr,
1655 const xfrm_address_t *saddr, int create,
1656 unsigned short family);
1657 int xfrm_sk_policy_insert(struct sock *sk, int dir, struct xfrm_policy *pol);
1658
1659 #ifdef CONFIG_XFRM_MIGRATE
1660 int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1661 const struct xfrm_migrate *m, int num_bundles,
1662 const struct xfrm_kmaddress *k,
1663 const struct xfrm_encap_tmpl *encap);
1664 struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net);
1665 struct xfrm_state *xfrm_state_migrate(struct xfrm_state *x,
1666 struct xfrm_migrate *m,
1667 struct xfrm_encap_tmpl *encap);
1668 int xfrm_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
1669 struct xfrm_migrate *m, int num_bundles,
1670 struct xfrm_kmaddress *k, struct net *net,
1671 struct xfrm_encap_tmpl *encap);
1672 #endif
1673
1674 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport);
1675 void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid);
1676 int km_report(struct net *net, u8 proto, struct xfrm_selector *sel,
1677 xfrm_address_t *addr);
1678
1679 void xfrm_input_init(void);
1680 int xfrm_parse_spi(struct sk_buff *skb, u8 nexthdr, __be32 *spi, __be32 *seq);
1681
1682 void xfrm_probe_algs(void);
1683 int xfrm_count_pfkey_auth_supported(void);
1684 int xfrm_count_pfkey_enc_supported(void);
1685 struct xfrm_algo_desc *xfrm_aalg_get_byidx(unsigned int idx);
1686 struct xfrm_algo_desc *xfrm_ealg_get_byidx(unsigned int idx);
1687 struct xfrm_algo_desc *xfrm_aalg_get_byid(int alg_id);
1688 struct xfrm_algo_desc *xfrm_ealg_get_byid(int alg_id);
1689 struct xfrm_algo_desc *xfrm_calg_get_byid(int alg_id);
1690 struct xfrm_algo_desc *xfrm_aalg_get_byname(const char *name, int probe);
1691 struct xfrm_algo_desc *xfrm_ealg_get_byname(const char *name, int probe);
1692 struct xfrm_algo_desc *xfrm_calg_get_byname(const char *name, int probe);
1693 struct xfrm_algo_desc *xfrm_aead_get_byname(const char *name, int icv_len,
1694 int probe);
1695
1696 static inline bool xfrm6_addr_equal(const xfrm_address_t *a,
1697 const xfrm_address_t *b)
1698 {
1699 return ipv6_addr_equal((const struct in6_addr *)a,
1700 (const struct in6_addr *)b);
1701 }
1702
1703 static inline bool xfrm_addr_equal(const xfrm_address_t *a,
1704 const xfrm_address_t *b,
1705 sa_family_t family)
1706 {
1707 switch (family) {
1708 default:
1709 case AF_INET:
1710 return ((__force u32)a->a4 ^ (__force u32)b->a4) == 0;
1711 case AF_INET6:
1712 return xfrm6_addr_equal(a, b);
1713 }
1714 }
1715
1716 static inline int xfrm_policy_id2dir(u32 index)
1717 {
1718 return index & 7;
1719 }
1720
1721 #ifdef CONFIG_XFRM
1722 static inline int xfrm_aevent_is_on(struct net *net)
1723 {
1724 struct sock *nlsk;
1725 int ret = 0;
1726
1727 rcu_read_lock();
1728 nlsk = rcu_dereference(net->xfrm.nlsk);
1729 if (nlsk)
1730 ret = netlink_has_listeners(nlsk, XFRMNLGRP_AEVENTS);
1731 rcu_read_unlock();
1732 return ret;
1733 }
1734
1735 static inline int xfrm_acquire_is_on(struct net *net)
1736 {
1737 struct sock *nlsk;
1738 int ret = 0;
1739
1740 rcu_read_lock();
1741 nlsk = rcu_dereference(net->xfrm.nlsk);
1742 if (nlsk)
1743 ret = netlink_has_listeners(nlsk, XFRMNLGRP_ACQUIRE);
1744 rcu_read_unlock();
1745
1746 return ret;
1747 }
1748 #endif
1749
1750 static inline unsigned int aead_len(struct xfrm_algo_aead *alg)
1751 {
1752 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1753 }
1754
1755 static inline unsigned int xfrm_alg_len(const struct xfrm_algo *alg)
1756 {
1757 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1758 }
1759
1760 static inline unsigned int xfrm_alg_auth_len(const struct xfrm_algo_auth *alg)
1761 {
1762 return sizeof(*alg) + ((alg->alg_key_len + 7) / 8);
1763 }
1764
1765 static inline unsigned int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay_esn)
1766 {
1767 return sizeof(*replay_esn) + replay_esn->bmp_len * sizeof(__u32);
1768 }
1769
1770 #ifdef CONFIG_XFRM_MIGRATE
1771 static inline int xfrm_replay_clone(struct xfrm_state *x,
1772 struct xfrm_state *orig)
1773 {
1774 x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),
1775 GFP_KERNEL);
1776 if (!x->replay_esn)
1777 return -ENOMEM;
1778
1779 x->replay_esn->bmp_len = orig->replay_esn->bmp_len;
1780 x->replay_esn->replay_window = orig->replay_esn->replay_window;
1781
1782 x->preplay_esn = kmemdup(x->replay_esn,
1783 xfrm_replay_state_esn_len(x->replay_esn),
1784 GFP_KERNEL);
1785 if (!x->preplay_esn) {
1786 kfree(x->replay_esn);
1787 return -ENOMEM;
1788 }
1789
1790 return 0;
1791 }
1792
1793 static inline struct xfrm_algo_aead *xfrm_algo_aead_clone(struct xfrm_algo_aead *orig)
1794 {
1795 return kmemdup(orig, aead_len(orig), GFP_KERNEL);
1796 }
1797
1798
1799 static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)
1800 {
1801 return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);
1802 }
1803
1804 static inline struct xfrm_algo_auth *xfrm_algo_auth_clone(struct xfrm_algo_auth *orig)
1805 {
1806 return kmemdup(orig, xfrm_alg_auth_len(orig), GFP_KERNEL);
1807 }
1808
1809 static inline void xfrm_states_put(struct xfrm_state **states, int n)
1810 {
1811 int i;
1812 for (i = 0; i < n; i++)
1813 xfrm_state_put(*(states + i));
1814 }
1815
1816 static inline void xfrm_states_delete(struct xfrm_state **states, int n)
1817 {
1818 int i;
1819 for (i = 0; i < n; i++)
1820 xfrm_state_delete(*(states + i));
1821 }
1822 #endif
1823
1824 #ifdef CONFIG_XFRM
1825 static inline struct xfrm_state *xfrm_input_state(struct sk_buff *skb)
1826 {
1827 struct sec_path *sp = skb_sec_path(skb);
1828
1829 return sp->xvec[sp->len - 1];
1830 }
1831 #endif
1832
1833 static inline struct xfrm_offload *xfrm_offload(struct sk_buff *skb)
1834 {
1835 #ifdef CONFIG_XFRM
1836 struct sec_path *sp = skb_sec_path(skb);
1837
1838 if (!sp || !sp->olen || sp->len != sp->olen)
1839 return NULL;
1840
1841 return &sp->ovec[sp->olen - 1];
1842 #else
1843 return NULL;
1844 #endif
1845 }
1846
1847 void __init xfrm_dev_init(void);
1848
1849 #ifdef CONFIG_XFRM_OFFLOAD
1850 void xfrm_dev_resume(struct sk_buff *skb);
1851 void xfrm_dev_backlog(struct softnet_data *sd);
1852 struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again);
1853 int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
1854 struct xfrm_user_offload *xuo);
1855 bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x);
1856
1857 static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1858 {
1859 struct xfrm_state_offload *xso = &x->xso;
1860
1861 if (xso->dev && xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn)
1862 xso->dev->xfrmdev_ops->xdo_dev_state_advance_esn(x);
1863 }
1864
1865 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1866 {
1867 struct xfrm_state *x = dst->xfrm;
1868 struct xfrm_dst *xdst;
1869
1870 if (!x || !x->type_offload)
1871 return false;
1872
1873 xdst = (struct xfrm_dst *) dst;
1874 if (!x->xso.offload_handle && !xdst->child->xfrm)
1875 return true;
1876 if (x->xso.offload_handle && (x->xso.dev == xfrm_dst_path(dst)->dev) &&
1877 !xdst->child->xfrm)
1878 return true;
1879
1880 return false;
1881 }
1882
1883 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1884 {
1885 struct xfrm_state_offload *xso = &x->xso;
1886
1887 if (xso->dev)
1888 xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
1889 }
1890
1891 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1892 {
1893 struct xfrm_state_offload *xso = &x->xso;
1894 struct net_device *dev = xso->dev;
1895
1896 if (dev && dev->xfrmdev_ops) {
1897 if (dev->xfrmdev_ops->xdo_dev_state_free)
1898 dev->xfrmdev_ops->xdo_dev_state_free(x);
1899 xso->dev = NULL;
1900 dev_put(dev);
1901 }
1902 }
1903 #else
1904 static inline void xfrm_dev_resume(struct sk_buff *skb)
1905 {
1906 }
1907
1908 static inline void xfrm_dev_backlog(struct softnet_data *sd)
1909 {
1910 }
1911
1912 static inline struct sk_buff *validate_xmit_xfrm(struct sk_buff *skb, netdev_features_t features, bool *again)
1913 {
1914 return skb;
1915 }
1916
1917 static inline int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, struct xfrm_user_offload *xuo)
1918 {
1919 return 0;
1920 }
1921
1922 static inline void xfrm_dev_state_delete(struct xfrm_state *x)
1923 {
1924 }
1925
1926 static inline void xfrm_dev_state_free(struct xfrm_state *x)
1927 {
1928 }
1929
1930 static inline bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x)
1931 {
1932 return false;
1933 }
1934
1935 static inline void xfrm_dev_state_advance_esn(struct xfrm_state *x)
1936 {
1937 }
1938
1939 static inline bool xfrm_dst_offload_ok(struct dst_entry *dst)
1940 {
1941 return false;
1942 }
1943 #endif
1944
1945 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
1946 {
1947 if (attrs[XFRMA_MARK])
1948 memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
1949 else
1950 m->v = m->m = 0;
1951
1952 return m->v & m->m;
1953 }
1954
1955 static inline int xfrm_mark_put(struct sk_buff *skb, const struct xfrm_mark *m)
1956 {
1957 int ret = 0;
1958
1959 if (m->m | m->v)
1960 ret = nla_put(skb, XFRMA_MARK, sizeof(struct xfrm_mark), m);
1961 return ret;
1962 }
1963
1964 static inline __u32 xfrm_smark_get(__u32 mark, struct xfrm_state *x)
1965 {
1966 struct xfrm_mark *m = &x->props.smark;
1967
1968 return (m->v & m->m) | (mark & ~m->m);
1969 }
1970
1971 static inline int xfrm_if_id_put(struct sk_buff *skb, __u32 if_id)
1972 {
1973 int ret = 0;
1974
1975 if (if_id)
1976 ret = nla_put_u32(skb, XFRMA_IF_ID, if_id);
1977 return ret;
1978 }
1979
1980 static inline int xfrm_tunnel_check(struct sk_buff *skb, struct xfrm_state *x,
1981 unsigned int family)
1982 {
1983 bool tunnel = false;
1984
1985 switch(family) {
1986 case AF_INET:
1987 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4)
1988 tunnel = true;
1989 break;
1990 case AF_INET6:
1991 if (XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6)
1992 tunnel = true;
1993 break;
1994 }
1995 if (tunnel && !(x->outer_mode.flags & XFRM_MODE_FLAG_TUNNEL))
1996 return -EINVAL;
1997
1998 return 0;
1999 }
2000 #endif /* _NET_XFRM_H */
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